<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .a {
            width: 200px;
            height: 300px;
            float: left;
            background-color: #f00;
        }

        .b {
            height: 400px;
            /* margin-left: 200px;
            margin-right: 200px; */

            overflow: hidden;
            background-color: #ff0;
        }

        .c {
            width: 200px;
            height: 300px;
            float: right;
            background-color: #f00;
        }


        body {
            color: red;
            text-align: center;
        }
    </style>
</head>

<body>

    <div class="a"></div>
    <div class="c"></div>
    <div class="b"></div>



    <input type="text">

</body>

</html>